/[pcre]/code/tags/pcre-6.7/pcrecpparg.h.in
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Contents of /code/tags/pcre-6.7/pcrecpparg.h.in

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Revision 92 - (hide annotations) (download)
Sat Feb 24 21:41:36 2007 UTC (7 years, 1 month ago) by nigel
File size: 6362 byte(s)
Tag code/trunk as code/tags/pcre-6.7.

1 nigel 87 // Copyright (c) 2005, Google Inc.
2     // All rights reserved.
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26     // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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29     //
30     // Author: Sanjay Ghemawat
31    
32     #ifndef _PCRECPPARG_H
33     #define _PCRECPPARG_H
34    
35     #include <stdlib.h> // for NULL
36     #include <string>
37    
38     namespace pcrecpp {
39    
40     class StringPiece;
41    
42     // Hex/Octal/Binary?
43    
44     // Special class for parsing into objects that define a ParseFrom() method
45     template <class T>
46     class _RE_MatchObject {
47     public:
48     static inline bool Parse(const char* str, int n, void* dest) {
49     T* object = reinterpret_cast<T*>(dest);
50     return object->ParseFrom(str, n);
51     }
52     };
53    
54     class Arg {
55     public:
56     // Empty constructor so we can declare arrays of Arg
57     Arg();
58    
59     // Constructor specially designed for NULL arguments
60     Arg(void*);
61    
62     typedef bool (*Parser)(const char* str, int n, void* dest);
63    
64     // Type-specific parsers
65     #define PCRE_MAKE_PARSER(type,name) \
66     Arg(type* p) : arg_(p), parser_(name) { } \
67     Arg(type* p, Parser parser) : arg_(p), parser_(parser) { }
68    
69    
70     PCRE_MAKE_PARSER(char, parse_char);
71     PCRE_MAKE_PARSER(unsigned char, parse_uchar);
72     PCRE_MAKE_PARSER(short, parse_short);
73     PCRE_MAKE_PARSER(unsigned short, parse_ushort);
74     PCRE_MAKE_PARSER(int, parse_int);
75     PCRE_MAKE_PARSER(unsigned int, parse_uint);
76     PCRE_MAKE_PARSER(long, parse_long);
77     PCRE_MAKE_PARSER(unsigned long, parse_ulong);
78     #if @pcre_have_long_long@
79     PCRE_MAKE_PARSER(long long, parse_longlong);
80     #endif
81     #if @pcre_have_ulong_long@
82     PCRE_MAKE_PARSER(unsigned long long, parse_ulonglong);
83     #endif
84     PCRE_MAKE_PARSER(float, parse_float);
85     PCRE_MAKE_PARSER(double, parse_double);
86     PCRE_MAKE_PARSER(std::string, parse_string);
87     PCRE_MAKE_PARSER(StringPiece, parse_stringpiece);
88    
89     #undef PCRE_MAKE_PARSER
90    
91     // Generic constructor
92     template <class T> Arg(T*, Parser parser);
93     // Generic constructor template
94     template <class T> Arg(T* p)
95     : arg_(p), parser_(_RE_MatchObject<T>::Parse) {
96     }
97    
98     // Parse the data
99     bool Parse(const char* str, int n) const;
100    
101     private:
102     void* arg_;
103     Parser parser_;
104    
105     static bool parse_null (const char* str, int n, void* dest);
106     static bool parse_char (const char* str, int n, void* dest);
107     static bool parse_uchar (const char* str, int n, void* dest);
108     static bool parse_float (const char* str, int n, void* dest);
109     static bool parse_double (const char* str, int n, void* dest);
110     static bool parse_string (const char* str, int n, void* dest);
111     static bool parse_stringpiece (const char* str, int n, void* dest);
112    
113     #define PCRE_DECLARE_INTEGER_PARSER(name) \
114     private: \
115     static bool parse_ ## name(const char* str, int n, void* dest); \
116     static bool parse_ ## name ## _radix( \
117     const char* str, int n, void* dest, int radix); \
118     public: \
119     static bool parse_ ## name ## _hex(const char* str, int n, void* dest); \
120     static bool parse_ ## name ## _octal(const char* str, int n, void* dest); \
121     static bool parse_ ## name ## _cradix(const char* str, int n, void* dest)
122    
123     PCRE_DECLARE_INTEGER_PARSER(short);
124     PCRE_DECLARE_INTEGER_PARSER(ushort);
125     PCRE_DECLARE_INTEGER_PARSER(int);
126     PCRE_DECLARE_INTEGER_PARSER(uint);
127     PCRE_DECLARE_INTEGER_PARSER(long);
128     PCRE_DECLARE_INTEGER_PARSER(ulong);
129     PCRE_DECLARE_INTEGER_PARSER(longlong);
130     PCRE_DECLARE_INTEGER_PARSER(ulonglong);
131    
132     #undef PCRE_DECLARE_INTEGER_PARSER
133     };
134    
135     inline Arg::Arg() : arg_(NULL), parser_(parse_null) { }
136     inline Arg::Arg(void* p) : arg_(p), parser_(parse_null) { }
137    
138     inline bool Arg::Parse(const char* str, int n) const {
139     return (*parser_)(str, n, arg_);
140     }
141    
142     // This part of the parser, appropriate only for ints, deals with bases
143     #define MAKE_INTEGER_PARSER(type, name) \
144     inline Arg Hex(type* ptr) { \
145     return Arg(ptr, Arg::parse_ ## name ## _hex); } \
146     inline Arg Octal(type* ptr) { \
147     return Arg(ptr, Arg::parse_ ## name ## _octal); } \
148     inline Arg CRadix(type* ptr) { \
149     return Arg(ptr, Arg::parse_ ## name ## _cradix); }
150    
151     MAKE_INTEGER_PARSER(short, short);
152     MAKE_INTEGER_PARSER(unsigned short, ushort);
153     MAKE_INTEGER_PARSER(int, int);
154     MAKE_INTEGER_PARSER(unsigned int, uint);
155     MAKE_INTEGER_PARSER(long, long);
156     MAKE_INTEGER_PARSER(unsigned long, ulong);
157     #if @pcre_have_long_long@
158     MAKE_INTEGER_PARSER(long long, longlong);
159     #endif
160     #if @pcre_have_ulong_long@
161     MAKE_INTEGER_PARSER(unsigned long long, ulonglong);
162     #endif
163    
164     #undef PCRE_IS_SET
165     #undef PCRE_SET_OR_CLEAR
166     #undef MAKE_INTEGER_PARSER
167    
168     } // namespace pcrecpp
169    
170    
171     #endif /* _PCRECPPARG_H */

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